Improved tuyere



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lJOSEPH J. P1ERCE,1OF EMMETT,M1CH1GAN.

Letters Patent No. 87,702, dated Ma/rch 9, 1869.

IMPROVED TUYER'E.

'luyeres for blacksmiths" forges; and I do declare thev following to be a full, clear, and exact description, which will enable others skilled in the art to make and use my invention, reference-.being had to the accompany-l ing drawings, and to the -letters of reference marked thereon.

Figure 1 is a perspective View of the tuyere.

Figure 2 is a transverse section, showing the regulator, for which the petitioner desires Letters Patent.

The nature of this invention is to preduce countercurrents of air through the forge, to regulate the quantity of air passing through the tuyere, and to modify the intensity of the heat, so as to produce a uniform melting-heat, instead of a concentrated burning-heat, which, in all cases, injures the quality of refined steel,

hen an atterrpt is lmade to weld over an imperfect tuyere.

This tuyere is cast in-a square-box form, the bottom of which is cast separate, and in a form to fit closely, when secured to the box marked A', by means of the two bolts marked B B. i

The upper side of the box is provided with a slot, G,

in the centre, and of aform as shown on the drawings.4

The slot is out bevelling from the upper surface inward, so that it i's Wider inside the box than outside. i

On the inside of the box, and in line with the slot G, is a fulcrum, G, provided with a pin, for the purpose of securing the lever D, being a part of the regulator.' p

The lever is constructed with an elbow at the centre `of the point, where it is attached to the fulcrm O, by means of a pin.

The lower end of. the lever D is provided with a hingejoint, to receive a rod, E, which passes through the box A and pipe L K sufficiently far to be opened by the hand.

' The opposite end, I, of the lever D, is provided with a bevel-edge, having a swell in the centre, so as to fit precisely the'slot G. ,y

The box is provided with `two tubes, H and L, placed at right angles. y i

The tube H vis to receive a bellows-pipe'.

rLhe tube L is provided with a joint of pipe, K, of

sufcient length to reach from the box to the front side of the forge.

This pipe K isprovided with a wooden plug, R, made hollow, to which is attached a' valve, marked M. This valve is connected to the plug by a hinge on the lower side of the'valve, so that when the blast from the bellows ceases,the valve drops downto about 10, thus allowing a direct current of air to pass through the tube into the box, and through the slot above, keeping the re alive until the coal is consumed. The operation of the bellows closes the valve.

All parts of the regulator, with the exception of the part immediately under the slot, do not come in contact with the box, and, consequently,V are not subject to expansion, and contraction, and warping out of place.

The plug can readily be 'withdrawm'and theregulator closed in the slot. Then, by means of the bellows, the ashes and dirt accumulated in the box can be blown out. By briskly moving the regulator, the slot can readily be cleared of all obstructions.

Having thus described my invention, What I claim, and desire to secure by Letters Pateut, isi The arrangement of the box A, with bevelled slot G, tubes H L, fulcrum C, knee-lever D, with bevel I, rod E, pipe K, vhollow plug B., and valve M, all constructed substantially as set forth; l

' JOSEPH J. PIERCE. Witnesses:

H. H. HUBBARD, T. M. MoOoRD. 

